Corkscrew



FIG. 1 is a front elevational view of a corkscrew showing my new design, the opposite being a mirror image of the front view;

FIG. 2 is a left side view of the corkscrew of FIG. 1;

FIG. 3 is a right side view of the corkscrew of FIG. 1; and,

FIG. 4 is a plan view of the corkscrew of FIGS. 1, 2 and 3. 

The ornamental design for a corkscrew, as shown and described. 